After Facebook pushed out their Facebook Chat upgrade in the past few months, I know hundred of people have go to the Forum to discuss how to clear the Facebook Chat history. Unfortunately, it is sad to tell you that this feature appeared to have been removed by Facebook completely.
Although you can’t clear the Facebook Chat history anymore right now, but you can permanently delete the Facebook Chat history of your friends with few cumbersome steps, you have no other quick ways to delete the Facebook Chat history of your friends.
To delete the Facebook Chat history permanently:-
1) Click the Option and then select See Full Conversation in your selected friend’s chat box.
2) From the top right corner, you can see the Action button, click on that and select Delete Messanges…
3) Click on Delete All button to delete all the conversation between you and your friend permanently. (of course you can either choose to delete selected conversation if you want)
My two cents, Facebook always improving their products, and I hope Facebook can open back the wonderful feature to clear the chat history in one click in near future, I believe that this is all Facebook Users want it, right?